Grease a 1 1/2-quart souffle dish with butter.,Whisk eggs, cream, salt, pepper, and nutmeg in a bowl. Stir in spinach, onion, and Gouda cheese. Pour into the prepared souffle dish.,______,Release pressure using the fast-release method, about 5 minutes. Open and remove the lid. Lift quiche by grabbing the ends of the foil sling. Let cool for 5 minutes.